# How do you read a capacitor value on a disc?

## How do you read a capacitor value on a disc?

Read codes that contain letters instead. If the letter is an R, replace it with a decimal point to get the capacitance in pF. For example, 4R1 means a capacitance of 4.1pF. If the letter is p, n, or u, this tells you the units (pico-, nano-, or microfarad). Replace this letter with a decimal point.

## How do you read a chip capacitor value?

Many capacitors are labeled with three numbers and, usually, a letter. The number represents the value and a multiplier, all expressed in picofarads. For example, a capacitor that reads \”122\” would have a value of 12 plus two zeros, or 1200, pF. A capacitor marked \”475\” would have a value of 4,700,000 pF, or 4.7?

Use the multimeter and read the voltage on the capacitor leads. The voltage should read near 9 volts. The voltage will discharge rapidly to 0V because the capacitor is discharging through the multimeter. If the capacitor will not retain that voltage, it is defective and should be replaced.

What do the numbers on capacitors mean?

Many capacitor manufacturers use a shorthand notation to indicate capacitance on small caps.\nIf you have a capacitor that has nothing other than a three-digit number printed on it, the third digit represents the number of zeros to add to the end of the first two digits. The resulting number is the capacitance in pF.

### How do you read capacitors with a multimeter?

Connect the test leads to the capacitor terminals. Keep test leads connected for a few seconds to allow the multimeter to automatically select the proper range. Read the measurement displayed. If the capacitance value is within the measurement range, the multimeter will display the capacitor’s value.

How do you identify a capacitor?

If the letter is an R,replace it with a decimal point to get the capacitance in pF. For example,4R1 means a capacitance of 4.1pF.

• If the letter is p,n,or u,this tells you the units (pico-,nano-,or microfarad). Replace this letter with a decimal point.
• A code like “1A253” is actually two codes.
• How do you find the capacitance of a capacitor?

Area of plates. Capacitance is directly proportional to the physical size of the plates as determined by the plate area,A.

• Plates seperation. `Capacitance is inversely proportional to the distance between the plates.
• Dielectric Constant of material.
• Formula of capacitance in terms of physical parameters.
• #### How do I check a capacitor?

– If the calculated value is nearly equal or having a difference of ±10 to ±20 to the desired capacitor. It is a Good Capacitor. – If the calculated value is far away with a noticeable difference, the capacitor is faulty. – In our example, the calculated value is almost the same as the actual value of the capacitor.

#### How to determine the value of capacitors?

Types of Capacitors in AC Circuits. When the capacitors are used in AC circuits then capacitors act differently as compared with resistors,as resistors permit electrons to flow throughout them

• Applications of Capacitors.
• Conversion Formula.
• Understanding the Reset Capacitor Function in Microcontroller.